Quit now while you still can that way you have an early start on quitting. Rid all the ashtrays and cigarettes.
You may have to buy a new wardrobe though. Cigarette nicotine are all over your clothes, car, and it seeps through your pores on your skin. The reason for the new wardrobe is because of the smell. Your car will also have the smell too. The car you cannot do anything about it. You may think, smell? What smell? Cigarettes dull your senses and smells are very different from a non-smoker. When you quit, you'll want cigarettes constantly and the air will smell fresher and better than having to breathe in cigarette smoke. Second hand smoke is just as dangerous as smoking a cigarette.
For drapes, change them out.
If you have kids, you'll be doing them a grand favor. Preventing them from being smokers themselves.
My parents used to smoke. My father passed away to lung, brain, and adrenal gland cancer=smoking until he died. My mother had a severe heart attack that kept her in the hospital for a very long time on oxygen. Do you want to be on oxygen for the rest of your life? My mother spent seven days on oxygen and could not breathe without it. She went through torture to get back to her life.
As for the walls, if it's wallpater Bleach and soapy water. If it's enamel, bleach and soapy water. If it's flat paint, use Kilz and primary coat. There's no other way to get rid of the smell.
If you plan on selling your car to a non-smoker, they will not purchase it. Sorry for this bad information, but it's true. I will not step foot in a place where there is smokers and there are people smoking around the door. People have to realize that many people are highly sensitive to smoke. I'm talking about Asthmatics. People think asthma is just a joke. Believe me, I've been laughed at just because I was gasping like a gold fish and unable to get any air in. It's not fun when you cannot breathe, so if you smoke, think about the harm you're causing others. Whether they have asthma or some lung disease. Think of how they might feel when they pass through your smoke. They will not tell you you stink, but I will say something because it's my right as non-smoker to ask someone to move out of my way.